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Nitrous improved the performance of cars to a great extent, allowing them to drift with much bigger angle at lower speeds. With nitrous engaged, vehicles accelerated quicker, and decelerated slower. Nitrous was a limited, purchasable performance upgrade for most vehicles in San Andreas. Even the quickest rear-wheel drive cars regain traction when spinning around, unless nitrous is engaged. The sharp deceleration in reverse makes “donuts” impossible without nitrous activated. Vehicles decelerate unrealistically while moving in reverse however, which made performing J-turns or 360 turns impossible without nitrous or speed, or a slope. Handbrake deceleration encouraged drifting, turning angles during drifts could be very low or very high, and weight transfer could be used to initiate a drift. These revised physics emulated reality well in certain ways. In Grand Theft Auto: San Andreas, vehicular handling physics were greatly improved. The driver is "spinning out" around a corner, but remains in control of the vehicle. A driver controls this loss of traction through many rigorous throttle and steering corrections, and is "controlling" a vehicle that is trying to spin around. The vehicle has lost rear traction and is spinning around, but the driver is preventing the car from spinning around completely. While a vehicle is drifting, it travels around a corner on an angle. When a vehicle drifts around a left turn, ideally, the driver is steering right. When a vehicle drives around a left turn, for example, the driver is steering left.
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The differences between drifting around corners and driving around corners are best described visually (watch professionals to better understand these differences).
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But, prior to the release of Grand Theft Auto: San Andreas, drifting did not offer players much car control. Drifting has been available to players since Grand Theft Auto III. In rally racing, however, drifting is an essential technique for many corners (due to rough terrain, which can sometimes require alternative driving methods to achieve higher cornering speeds). On tarmac, drifting is normally a slower cornering method than traditional methods used by professional drivers. In exchange for greater tire friction and lower cornering speed, drifting improves the rate at which a car can steer in any direction.
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